Master's MateSafety Initiative Network
The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
Towing Vessel
Sea Service
MMSI 366814440 · Call sign WDA4909
Not yet on Master's MateType
Towing Vessel
Flag
USALength
31.9 m
Beam
9.4 m
Draft
4.9 m
Call sign
WDA4909
IMO
7643708
Official No.
570691
AIS reports
1
Sea Service, an utility boat flagged in the United States, measures 31.9 metres on deck. She carries a beam measuring 9.4 metres and a 4.9-metre draft. Officially she's MMSI 366814440, call sign WDA4909, IMO 7643708. Join Sea Service to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like Sea Service.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Sea Service roams, you're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
Free with your claim · for working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Sea Service on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim Sea Service and switch it all on
Free to join · nothing to install to start · cancel anytime
About Sea Service
What kind of vessel is Sea Service?
Sea Service is a Towing Vessel flagged to United States of America.
What is Sea Service's MMSI?
Sea Service's MMSI is 366814440. Call sign WDA4909. IMO 7643708.
How big is Sea Service?
Sea Service is about 31.9 m long, 9.4 m on the beam, drawing 4.9 m.
Is Sea Service on the Master's Mate Safety Initiative Network?
Not yet. If Sea Service is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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